I've searched this forum for solutions to my problem but none of them have been able to solve it.
Since yesterday, whenever I try to launch this game through Steam, nothing happens. All I get is the Steam message "Preparing to launch Spiral Knights..." and that's it. I checked my Task Manager and I notice that the javaw.exe process doesn't show up at all. I've uninstalled Spiral Knights, Steam and Java from my computer, reinstalled them but to no avail. When I reinstall Spiral Knights, the installer stops at 99% and the game will not launch. I do not know what other information you would need from me in order to help, but if you tell me what information you want and perhaps how to obtain it (I'm not that computer savvy), I'd gladly provide it for you. For what its worth I run on Windows 7 and have ATI Mobility Radeon HD 4500/5100 Series as my video card.
Can you please post your launcher.log file? It's default location for Steam users is
C:\Program Files\Steam\steamapps\common\spiral knights
.